Side bearing



April 29, 1930. G. s. CRAWFORD 1,756,283

SIDE BEARING Filed Jan. 21. 15-127 PM A's:

Patented Apr. 29, .1930 v *"'U J 'IY D STATES.

GEORGE s. CRAWFORD, F cIIIcAGo, ILLINOIS, ASSIGNOR r0 onIcA o,

OWE

ILLINOIS SIDE BEARING Application filed January '21, 1927. Serial No. 162,438.

This invention relates to certain novel and useful improvements in anti-friction bearings, more especially adapted for use as slde .o bearings for railway cars and consists of the "matters'hereinafter described and more particularlypointed out in theappendediclaims. r The invention as shown herein and In ts preferred embodiment is a side bearlng to be applied to the body bolster, as distinguished appear more from the truck bolster, offa railway car and I itsnovel features of constru'ctionrender its use of particular advantage when thus applied; V I

The object of the invention is to provide a bearing of the kind of simple and economical construction, in which the anti-friction roller, suspended from the casing,vis supported and centered by an improved resilient or spring-controlled mechanism in which-the" work of the resilient: member 'or spring is accomplished with a minimum of expansion and contraction thereof. v j

The many advantages of my'invention will f Figure; 4: is'a framentary side' elevation shown partially in longitudinal'central section showing the rollerand the 'other parts as when the roller is Off center; w

Referring now to that embodiment of the,

invention illustrated in the drawings and more particularly in Figures 1 to 3 thereof 10 indicates acasing adapted to be secured to the bottomside of a body bolster 11 in any usual or familiar inanner. As shown, the

. body bolster is inclined at an angle to the fully as I proceed with my speci horizontal and the base plate 12 of the casing has its top face correspondingly inclined at 7 an angle to the horizontal (transversely of the casing) for attachment to said body bolster. Projecting ears or extensions 13, 13 at the ends of the base plate are provided with bolt holes for securing the casing to the bolster in the manner described.

The casing is preferably made hollow with a bottom wall- 14' and with integralvertical side members 15; 15 and end members 16, 16. Said bottom wall 14 presents a bearing sur-.

face 17 on its bottom side against which an anti-friction roller 18 is designed to roll. The vertical side and end members 15 and 16 project somewhat below the bearing way 0r-surface'17 the side walls 15 providing side ways 15 15' to guide the .ends 19, 19

oft-he roller and the end walls 16 providing stops16 which are curved substantially to .the curvature of'the cylindrical surface of I the roller and merge into the bearing surface 17 on the bottom wall of the casing.

Extending transversely of the casing mid- I way between its ends is a boss or rib 20,

which is integral with and extends upwardly from the bottom wall 14. In-said rib is a transverse recess 21, which isenlarged' at its middle to receive a coiled spring 22. A stud 23 at the bottom of the recess 21 centers the spring 22 at its lower end. Its upper end engages a downwardly extending stud24, on a transverse bar 25. Said bar fits loosely in the top of'the recess 21 (see Figure 1) and is vertically movable therein. 7

26 indicates a U-bar the legs 26 of'which embrace the-sides of the casing and thebot tom-'or base member 26 of which is formed to provide a shaft which extends loosely through acentral bearing aperture 19 in the anti-frictionrollen The legs of the U-barv are formed at their upper ends with elongated .slots' or eyes 27 in which engage the ends of the "transverse bar 25. Shoulders 28 at the 'ends'of the bar 25 beyond the legs soI'IIIE n. woons, 01

5 u .7 a transverse bar 20 to compress the spring 22 of'the U-bar 26 lock the bar in its engagement within the eyes 27 of said legs. Thus the roller is connected to the casing by an oscillatable member, namely the U-bar 26; a vertically movable head member above the bearing surface 17 of the casing, namely the transverse bar 25; and a vertically acting re silient member or spring interposed between the head member and the casing, namely the spring 22.

It will be manifest from the foregoing description that the coiled spring-will act to force the'Ubar upwardly and by it to draw the roller into contact with the wear or bearing surface .17 on the bottom wall 1%. of the casing,this because the coiled spring 22, expanding between the bottom of the recess '21 and the bar 25, will cause said bar to en: gage 1n the tops of the eyes 27 of the U-bar and force said U-bar upwardly. iVVhen the roller 18, byreason of its engagement against abearing plate-onthe truck bolster is caused to roll along the bearing surface-17 towards one or the other end'of the casing, this'movement will actthrough the U-bar 26 and the in proportion-t0 the distance the roller moves beyond its normal middle position. The base member of theflU-bar follows the roller in its movement as shown in Figure 4 while its upper "ends remain substantially stationary,

the'U-bar as a whole being pivoted its eyes'27fonthe transverse bar 25. The U-bar thus assumes positions corresponding to the hypothenuse of a right angle triangle, whose *base represe'nts the distancethe roller 'is displaced from the center and whose altitude represents the line of actionof the spring 22. Taking this to represent the triangle of forces i' e' pon t Q Q le i llbesee t a the base'of the triangle represents the force tending to return the'rollertoitsinormal central position.

Upon he e ea e of hsro s y the b t-' t m-bea ng Plat t e expan io ofthe p in il ac oidrawi li U- a 2 upw ly and h h riz ntal mpqn tof the P121 x rted through the U bar-willact toreturn the roller to itscentral position,

It will'benotedthat in this operatign the spring willonly be CQlnpressedthrough a. distancemeasured on and in proportion to the vertical cemponent of the aforesaid triangle of'forces acting on the roller, This greatly reduces the movement ofthe springin the operationvof thedevice and tends to promote and prolong the life of itselastic efficiency. Asthe space allowed for a side bearin'g is generally limited andparticularly with a bolster having an inclinedbottom plate for the attachmentofthe side'bearing as herein illustrated, saidlbolster Plate 11 is'preferably provided with a slot 11 formed and located to permit the, projection therethrough of the upper ends of the U-bar. Such slotmust be made of such width as to permit the free swinging movement of said U-bar as heretofore explained. V

In order to prevent carelessness in the punching by the car builder of the necessary hole or slot 11 in the bolster plate 11 from interferring with the proper operation of the hearing, it is preferred to extend the transverse rib 20 in which the spring 22 and transverse bar 28 are located, somewhat above the level of the top plane of the bearing member 1-0,;as shown in Figures 2 and 3. This will prevent the application of the bearing to a bolster plate until the slotll therein has been properly cut and positioned.

I Whi i describing the invention I referred to several details of mechanical constrnction and arrangement as embodied in the preferred form of the construction, particularlywhenappliedato a body bolster, it will be understood that the invention is not limited thereby nor to that application (it also being capable of use with a truck bolster) except as may bepointed out'in the appended 7 claims.

I claim as my invention: 1. T a side bearing, in combination with a bearing member presenting a bearing surfacelonbne side and being constructed for attachment to a bolster onits other side,a transversely disposed roller engaged with said bearing surface, a transversely disposed vertically movable bar on the bolster side of said bearing member,a U-bar embracing the sides of said bearing member and pivotally connectedto saidtransverse her, said U-bar having a bottom member engaged with said oller a da'n zpansion co edpr ng ng in mean direct on nly nt rp ed b tween i iba nd sai ar glmembe 2. 1 1a si ebea ng, in c mbina n-with. a bearing member presentinga bearing surface onone sideand being constructedfor at- 3. a sidebearing in combination Wit-ha: bearlng memberpresentlng a bearing surface on one side with lateral guideways at the sides. andstop members at the ends thereof and being constructed, for attachment to a bolsteron its other side whereon it is provided withatransverse recess enlarged atdtsmiddle .toiprovide a seat for .a\ co iled spring, a trans verse roller-engaged withsaidbearing surface, a transverse bar movable vertically in the transverse recess in said bearing member,

a U-bar embracing said bearing member and pivotally engaged With said transverse bar,

said U-bar having a bottom member engaged in said roller, and an expansion coiled spring acting in a vertical'direction only disposed in said recess and engaged with said transverse In testimony that I claim the foregoing as my invention, I affix my signature this 13th dayof January, A. D. 1927.

GEORGE S. CRAWFORD. 

